Autodesk 62205-051408-9001 User Guide - Page 571

Blur/Sharpen Filters ❚❘❘ Resize Image-Blurs outward from the edges of the layer. Gaussian Blur Gaussian Blur uses a more complex formula for calculating its blurring effect than Box Blur. The results are more realistic and approximate the realworld effect of shooting a subject with an out-offocus lens. Radius-Varies the amount of the blurring effect. The radius is measured in pixels. Resize Image-Blurs outward from the edges of the layer. Motion Blur Use Motion Blur to simulate the blur created by fastmoving objects. To create a Motion Blur, Combustion takes samples of previous and subsequent frames and composites them over the current frame. Combustion uses subframe sampling to create a smooth effect. You control the number of samples, the transparency (or weight) of the samples, and the duration over which the samples are taken. Note: You must nest a layer before you use Motion Blur on that layer. See Blurring the Movement of a Nested Layer. Samples = 5 Samples = 20 Note: Increasing the Samples value causes the processing time to increase linearly. In many cases, you do not need anti-aliasing on a blurred layer, so to save processing time, you can turn it off. Phase-Specifies whether the Motion Blur is based on the movement before or after the current frame. A value of -100 places the Motion Blur before the current frame while a value of 100 places the Motion Blur after. A value of 0 is centered, which evenly distributes the Motion Blur. Shutter-Determines the size of the Motion Blur. It is essentially the number of frames over which the shutter is open. Increasing the Shutter value does not increase processing time. Motion Blur Controls The Motion Blur controls are described as follows. Samples-Determines the quality of the Motion Blur. Increasing the number of samples improves the quality of the Motion Blur, creating a softer effect. Shutter = 3 Shutter = 15 Motion Blur Graph-Determines the weight distribution of the samples. The vertical axis 555